It was a fair movie.
As to the question, there is *no way* leaving them alive and unchecked would be the smart thing to do. If nothing else, lock them up in a zoo somewhere so they don't get to kill more people.
You may think that this is cruel, since the tigers are endangered. Well, I don't care how many humans there are, it is simply wrong to say that letting a few of them die off so that an endangered species can stick around longer is worth it. The tigers acted out of need, but that doesn't mean it's okay to let them go around killing whoever's handy for food.
Just my point of view.